package com.liuning.OtherFunction;

import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * 倒计时
 */
public class TestSleep2 {

    public static void tenDown() throws InterruptedException {
        int num = 10;

        while (true) {
            Thread.sleep(1000);
            System.out.println(num--);
            if (num <= 0) {
                break;
            }
        }
    }

    public static void main(String[] args) {
        // try {
        //     tenDown();
        // } catch (InterruptedException e) {
        //     e.printStackTrace();
        // }

        //打印当前系统时间
        Date startTime = new Date(System.currentTimeMillis());
        while (true) {
            try {
                Thread.sleep(1000);
                System.out.println(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(startTime));
                //更新当前时间
                startTime = new Date(System.currentTimeMillis());
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}
